How to: white list all contacts

Before using zimbra I use to have the Anti-Spam-SMTP-Proxy (ASSP) (http://assp.sourceforge.net) which was just before the smtp filtering spam.

The question I have is how would we white list automatically all our contacts in order to bypass all filters.
The principle is that if I am sending an email to somebody is because I trust him, so even if his IP is blacklisted I should be able to get his emails.

Have you, or anyone else, implemented it with Zimbra? Have you entered it in bguzilla as an RFE?

Yes I did enter it in bugzilla.
I am new in zimbra. I first installed it in mod_jk but I had a lot of problems.
Now I just run it in a different port than my apache server.

Before I used ASSP and I was very happy with it. Unfortunately I have no clue on how to integrate it with zimbra.
You could just install it, as it is a proxy server, but ASSP to learn from what is spam and what it is not, you have to forward the spam to an email address. That would the the customization at zimbra side...